AEMC 6470B
Digital Ground Resistance Testers

• 3-Point Fall-of-Potential measurement with manual or automatic frequency selection
• 4-Point soil resistivity measurement with automatic calculation of Rho (ρ) and user selection of the Wenner or Schlumberger test method
• 2- and 4-Wire DC resistance measurement (Bond testing) with automatic polarity reversal
• 3-Point earth coupling measurement
• Automatic frequency scan from 40 to 513Hz for optimum test accuracy in electrically noisy environments
• Selectable test voltage limit of 16 or 32V with up to 250mA of test current
• Automatic recognition of all electrode connections and measurement of their resistance value
• Auto-off power management
• Optically isolated USB communication
• Remote set up and operation of all measurements using DataView® software supplied
• Automatic report generation
• Rechargeable NiMH batteries from wall charger or vehicle power
• Rugged dustproof and rainproof field case – IP54 rated in closed position
• IEC 61557 parts 4 and 5 compliant
• Includes DataView® software for data storage, real-time display, analysis, report generation and system configuration

The large LCD is easy-to-read and indicates grounding electrode resistance, test voltage, current and frequency. It also measures individual test electrode resistance, battery status and more depending on the measurement.

The Model 6470 is Cat IV rated to 50V and is over voltage protected to greater than 250V against accidental connection to live circuits. Live voltage, if present, is also displayed on screen. In the event of a system fault, the Model 6470 can withstand 250V between any two terminals.

Also included, are manual and automatic test frequency selection from 40 to 513Hz; user selectable Soil Resistivity test method (Wenner or Schlumberger); user selectable 2-Wire or 4-Wire Bond Resistance test and a Earth coupling test feature.

Additional features of the Model 6470 include: a heavy-duty field case sealed against dust and water when closed (the test button is also sealed against the elements); NiMH rechargeable batteries. An external charger powered from 120V/230V 50/60Hz is included. The Model 6470 can also be powered and charged from a 12V vehicle battery. Testing while recharging is allowed.

The Ground Resistance Tester Model 6470 is rugged, easy-to-use and ideal for maintenance crews and contractors performing numerous tests. It exceeds mechanical and safety specifications for shock, vibration and drop tests called out in IEC standards. The adjustable test frequency and filtering provide for rejection of high levels of interference, allowing it to be used under difficult conditions such as the presence of high stray currents that normally affect accuracy, and measured auxiliary rod resistance enables the user to optimize measurements in difficult soil environments.